CN107560938A - A kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength - Google Patents
A kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength Download PDFInfo
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- CN107560938A CN107560938A CN201710731057.2A CN201710731057A CN107560938A CN 107560938 A CN107560938 A CN 107560938A CN 201710731057 A CN201710731057 A CN 201710731057A CN 107560938 A CN107560938 A CN 107560938A
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Abstract
The present invention relates to composite insulator technical field, more particularly to a kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength.Boundary strength height in the case of hydrolysis can accurately be weighed.A kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength, including：The composite electric insulator core bar sheath of different manufacturers is cut into thickness identical core bar jacket thin slice by step 1), sheath is divided into at least two fan-shaped sheaths being connected respectively with plug interface, as test sample；Sheath plug extension test is carried out to test sample respectively, sheath fracture strength or boundary strength are calculated according to the interfacial area of maximum pull and core bar jacket；Step 3) carries out boiling to test sample and test sample after boiling is tested according to step 2)；Step 4) is plotted in time sheath fracture strength or boundary strength curve under the different boiling time, compares boiling time and boundary strength of the test sample when interface starts shedding off.
Description
Technical field
The present invention relates to composite insulator technical field, more particularly to a kind of different manufacturers composite electric insulator core bar of assessing to protect
Cover the method for boundary strength.
Background technology
Recommend in GB/T19519-2014 and GB/T22079-2008 compound absolutely with water diffusion leakage current assessment in 100 hours
The water-fast infringement ability at edge core bar jacket interface, its total leakage current measured include plug leakage current, core bar jacket circle
Leakage current, sheath leakage current and the surface leakage current in face etc., when water spreads, the water suction of plug and sheath affects always
Leakage current, the plug of different manufacturers, the material of sheath is different, diameter is also different, and various influence factors are (such as plug after water suction
Diameter of material, the material of sheath and core bar jacket etc.) it is also different to the influence degree of total leakage current, and core bar jacket
Boundary strength refers to the cohesive force size of plug and sheath, and therefore, measured total leakage current is difficult in the equivalent feelings of condition
The boundary strength of core bar jacket is characterized under condition, also cannot accurately weigh the boundary strength height in the case of hydrolysis.
At present, also without a kind of method that can be accurately weighed to the boundary strength height in the case of hydrolysis, with right
The boundary strength of the composite electric insulator core bar sheath of different manufacturers carries out accurate evaluation.
The content of the invention
It is a primary object of the present invention to, there is provided a kind of assessment different manufacturers composite electric insulator core bar sheath boundary strength
Method, the boundary strength height in the case of hydrolysis can accurately be weighed, so as to the compound inslation to different manufacturers
The boundary strength of sub- core bar jacket carries out accurate evaluation.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
The embodiment of the present invention provides a kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength, bag
Include：
Composite electric insulator core bar sheath after the removal full skirt of different manufacturers is cut into thickness identical by step 1) respectively
Core bar jacket thin slice, circumferencial direction of the corresponding sheath along plug is divided at least two and connected respectively with the plug interface
The fan-shaped sheath connect, as test sample；
Step 2) carries out sheath-core rod extension test to the test sample of different manufacturers respectively, until different manufacturers supply examination
Product sheath be broken or core bar jacket interface come off, according to the maximum pull during sheath-core rod extension test with it is corresponding
The interfacial area of plug and sheath calculates the sheath fracture strength or boundary strength corresponding to the test sample of different manufacturers；
Step 3) carries out boiling to the test sample of different manufacturers respectively, and the test sample after boiling is carried out according to step 2)
Sheath-core rod extension test；
Step 4) draws when m- sheath fracture of the test sample of different manufacturers corresponding under the different boiling time respectively
Intensity or boundary strength curve；
Step 5) compares test sample boiling time corresponding when interface starts shedding off and the boundary strength of different manufacturers,
The composite electric insulator core bar sheath boundary strength of different manufacturers is assessed.
Optionally, the composite electric insulator core bar sheath after the removal full skirt of different manufacturers is that core is cut into working fluid
Rod sheath thin slice.
Optionally, sheath-core rod extension test is carried out to the test sample of different manufacturers respectively, until different manufacturers supply examination
Product sheath is broken or core bar jacket interface comes off；Specifically include：
The plug of the test sample is fixed, fixed the fan-shaped sheath of one of them in test sample using fixture, and to institute
State fan-shaped sheath and apply pulling force so that the fan-shaped sheath moves under the drive of the fixture towards the direction away from the plug
It is dynamic.
Optionally, the fixture of the fixed sectors sheath is close to the fan-shaped sheath and the linkage interface of the plug, folder
Located at the both sides in the fan-shaped jacket thickness direction.
Optionally, the thickness of the core bar jacket thin slice is 4mm.
Optionally, corresponding to the center of the linkage interface of the direction of the pulling force and the fan-shaped sheath and the plug
Tangential direction is vertical.
Optionally, the speed of the movement is 5mm/min.
Optionally, sheath-core rod extension test is carried out to the test sample after boiling according to step 2) in the step 3)
Time is no more than 3 hours.
Optionally, the sheath fracture strength or boundary strength and the maximum pull during sheath-core rod extension test
Meet following relational expression between the interfacial area of corresponding plug and sheath：
σ=Fmax/S；
Wherein, σ represents sheath fracture strength or boundary strength, FmaxRepresent the maximum during sheath-core rod extension test
Pulling force, S represent the interfacial area of plug and sheath.
Optionally, the interfacial area S of the plug and sheath is equal to the linkage interface of corresponding fan-shaped sheath and plug
Along the length and the product of the thickness of the core bar jacket thin slice of the circumferencial direction of the plug.
The embodiment of the present invention provides a kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength, passes through
The composite electric insulator core bar sheath is cut into core bar jacket thin slice, and corresponding sheath is divided at least two difference
The fan-shaped sheath being connected with the plug interface, when needing to test the boundary strength of plug-sheath, by difference
The test sample of producer carries out sheath-core rod extension test before boiling and after boiling, can be to the sheath-core rod under the conditions of boiling
Boundary strength tested, so as to draw respectively the sheath fracture strength of the test sample of different manufacturers or boundary strength with
The curve of boiling time change, because in the case of no boiling, typically described sheath is first broken, and with boiling
The extension of time, sheath plug is easily broken between interface due to the infringement of water, therefore, it is possible to obtain core bar jacket circle
Corresponding boiling time and boundary strength when face starts shedding off, even if the material of sheath, the material of plug or diameter are different,
The interface of the sheath plug starts shedding off the bonding force of corresponding boiling time and boundary strength only between sheath plug
It is relevant, so as to accurately reflect the boundary strength height in the case of the hydrolysis of the composite insulator of different manufacturers, to different manufacturers
Composite insulator boundary strength carry out accurate evaluation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is a kind of side for assessing different manufacturers composite electric insulator core bar sheath boundary strength provided in an embodiment of the present invention
The schematic flow sheet of method；
Fig. 2 is a kind of schematic diagram that sheath-core rod extension test is carried out to test sample provided in an embodiment of the present invention；
Fig. 3 is that the test sample in a kind of tetra- producers of A, B, C and D provided in an embodiment of the present invention is carrying out sheath-core rod
During extension test, the drawing force-displacement curve figure that is obtained；
Fig. 4 is that producer A provided in an embodiment of the present invention when m- sheath fractures corresponding under the different boiling time are strong
Degree or core bar jacket boundary strength curve map；
Fig. 5 is that producer B provided in an embodiment of the present invention when m- sheath fractures corresponding under the different boiling time are strong
Degree or boundary strength curve map；
Fig. 6 is that producer C provided in an embodiment of the present invention when m- sheath fractures corresponding under the different boiling time are strong
Degree or boundary strength curve map；
Fig. 7 is that producer D provided in an embodiment of the present invention when m- sheath fractures corresponding under the different boiling time are strong
Degree or boundary strength curve map.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position relationship of the instruction such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are based on shown in the drawings
Orientation or position relationship, be for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
The embodiment of the present invention provides a kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength, referring to
Fig. 1, including：
Composite electric insulator core bar sheath after the removal full skirt of different manufacturers is cut into thickness identical by step 1) respectively
Core bar jacket thin slice, circumferencial direction of the corresponding sheath along plug is divided at least two and connected respectively with the plug interface
The fan-shaped sheath connect, as test sample；
Step 2) carries out sheath-core rod extension test to the test sample of different manufacturers respectively, until different manufacturers supply examination
Product sheath be broken or core bar jacket interface come off, according to the maximum pull during sheath-core rod extension test with it is corresponding
The interfacial area of plug and sheath calculates the sheath fracture strength or boundary strength corresponding to the test sample of different manufacturers；
Step 3) carries out boiling to the test sample of different manufacturers respectively, and the test sample after boiling is carried out according to step 2)
Sheath-core rod extension test；
Step 4) draws when m- sheath fracture of the test sample of different manufacturers corresponding under the different boiling time respectively
Intensity or boundary strength curve；
Step 5) compares test sample boiling time corresponding when interface starts shedding off and the boundary strength of different manufacturers,
The composite electric insulator core bar sheath boundary strength of different manufacturers is assessed.
The embodiment of the present invention provides a kind of method for assessing different manufacturers composite electric insulator core bar sheath boundary strength, passes through
The composite electric insulator core bar sheath is cut into core bar jacket thin slice, and corresponding sheath is divided at least two difference
The fan-shaped sheath being connected with the plug interface, when needing to test the boundary strength of plug-sheath, by difference
The test sample of producer carries out sheath-core rod extension test before boiling and after boiling, can be to the sheath-core rod under the conditions of boiling
Boundary strength tested, so as to draw respectively the sheath fracture strength of the test sample of different manufacturers or boundary strength with
The curve of boiling time change, because in the case of no boiling, typically described sheath is first broken, and with boiling
The extension of time, sheath plug is easily broken between interface due to the infringement of water, therefore, it is possible to obtain core bar jacket circle
Corresponding boiling time and boundary strength when face starts shedding off, even if the material of sheath, the material of plug or diameter are different,
The interface of the sheath plug starts shedding off the bonding force of corresponding boiling time and boundary strength only between sheath plug
It is relevant, so as to accurately reflect the boundary strength height in the case of the hydrolysis of the composite insulator of different manufacturers, to different manufacturers
Composite insulator boundary strength carry out accurate evaluation.
Wherein, the composite electric insulator core bar sheath after the removal full skirt of different manufacturers is cut into thickness identical plug shield
The concrete mode of set thin slice does not limit, as long as composite electric insulator core bar sheath can be cut into thickness identical core bar jacket
Thin slice.
In one embodiment of the invention, the composite electric insulator core bar sheath after the removal full skirt of different manufacturers is in flow fluid
Core bar jacket thin slice is cut into body.Cut in working fluid, core bar jacket cutting can be made more uniform, obtained
The more uniform core bar jacket thin slice of thickness, reduces measurement error to the full extent.
In another embodiment of the present invention, referring to Fig. 2, sheath-core rod stretching is carried out to the test sample of different manufacturers respectively
Test, until the test sample sheath fracture of different manufacturers or core bar jacket interface come off；Specifically include：
The plug 1 of the test sample is fixed, fixed the fan-shaped sheath 3 of one of them in test sample using fixture 2, and to
The fan-shaped sheath 3 applies pulling force so that the fan-shaped sheath 3 is under the drive of the fixture 2 towards the side away from the plug 1
To movement.
In embodiments of the present invention, by the way that the plug 1 of test sample is fixed, and fixture 2 is used by test sample wherein one
Individual fan-shaped sheath 3 is fixed, and is applied pulling force to the fan-shaped sheath 3 towards the direction away from the plug 1, can be made the fixture 2
The fan-shaped sheath 3 is driven to be moved towards the direction away from the plug 1, so as to be stretched relative to plug 1 to sheath,
When the sheath is (material is preferable) not easy to break, and the interface binding force of core bar jacket is smaller, the interface of core bar jacket is preferential
Fracture, on the contrary, when the sheath is compared with easy fracture (material is poor), and when the interface binding force of core bar jacket is larger, then sheath
Preferential fracture, so as to carry out qualitative test relative to the intensity of sheath to the interface binding force of different manufacturers respectively.
Wherein, the fixed form of the plug 1 is not limited, plug can be clamped using fixture and be fixed.
Wherein, the specific fixed position of the fixture 2 is not limited.In order in sheath motion process, make sheath and
The interface stress of plug is more uniform, it is preferred that connection circle of the fixture 2 close to the fan-shaped sheath 3 and the plug 1
Face, it is located in the both sides of the thickness direction of fan-shaped sheath 3.
Wherein, it is preferred that the thickness of the core bar jacket thin slice is 4mm.Be advantageous to the fixture of fixed sectors sheath to fan
The clamping and fixation of shape sheath.
In another embodiment of the present invention, the direction of the pulling force and connection circle of the fan-shaped sheath 3 and the plug 1
Tangential direction corresponding to the center in face is vertical.In embodiments of the present invention, the court of fan-shaped sheath 3 is driven in the fixture 2
When direction away from plug 1 is moved, it is believed that stretching is in quasistatic, and the interface stress between sheath and plug can be made more equal
It is even.
Preferably, the fan-shaped sheath is to be moved under the drive of the fixture with 5mm/min speed.Based on this,
The change curve of pulling force-displacement can be obtained, when pulling force is sufficiently large, fracture occurs for the sheath or core bar jacket occurs to take off
Fall.Therefore, a maximum pull is had when sheath fracture or core bar jacket come off to correspond.
Wherein, in order to improve the accuracy of measurement result, it is preferred that in the step 3) according to step 2) to boiling after
The time that test sample carries out sheath-core rod extension test is no more than 3 hours.
In another embodiment of the present invention, the sheath fracture strength or boundary strength and sheath-core rod extension test mistake
Meet following relational expression between maximum pull and corresponding plug and the interfacial area of sheath in journey：
σ=Fmax/S；
Wherein, σ represents sheath fracture strength or boundary strength, FmaxRepresent the maximum during sheath-core rod extension test
Pulling force, S represent the interfacial area of plug and sheath.
Wherein, the interfacial area S of the corresponding plug and sheath refers to the fan-shaped sheath and the plug interface
The area of connection, this is relevant with the cutting mode of the sheath.The described at least two fan-shaped shields being connected with the plug interface
Set can be to be divided at least two parts fan-shaped sheaths obtained by the sheath, or sheath is arbitrarily split into formation
Fan-shaped sheath, is not limited herein.
Preferably, the described at least two fan-shaped sheaths 3 being connected with the interface of plug 1 be by the sheath be divided into
Few two parts of fan-shaped sheaths 3 obtained.So, the accuracy of measurement result can further be improved.
Wherein, the interfacial area S of the plug and sheath is equal to the linkage interface edge of corresponding fan-shaped sheath and plug
The length of the circumferencial direction of the plug and the product of the thickness of the core bar jacket thin slice.I.e. as illustrated, working as the sector
When the sheath is is divided into 8 parts of fan-shaped sheaths obtained by sheath, the linkage interface of the fan-shaped sheath and plug is along institute
The length for stating the circumferencial direction of plug is equal to 1/8d π, at this moment, corresponding sheath fracture strength or boundary strength such as following formula institute
Show, wherein, d represents the diameter of plug, and h represents the thickness of core bar jacket thin slice.
Hereinafter, the embodiment of the present invention will the present invention will be described by embodiment.These embodiments are merely to specific
Illustrate the present invention and propose example, those skilled in the art it is appreciated that the scope of the present invention not by these embodiments
Limitation.
Embodiment
1) insulator of tetra- producers of A, B, C and D is chosen as experimental subjects；
2) the core rod of insulator sheath after the removal full skirt of this four producers cut into working fluid respectively multiple
Thickness is 4mm core bar jacket thin slice.
3) sheath is divided into 8 etc. by the core bar jacket thin slice of four producers along the circumferencial direction of corresponding plug
Part, the test sample of four producers of acquisition.
4) plug of the test sample of four producers is fixed respectively, using fixture close to one of them described 1/8 sheath and
The linkage interface of the plug, the thickness direction both sides of 1/8 sheath are located in, apply pulling force (pulling force to 1/8 sheath
Direction it is vertical with the tangential direction corresponding to the center of 1/8 sheath and the linkage interface of the plug) so that described 1/
8 sheaths are moved towards the direction away from the plug with 5mm/min speed, with the increase of pulling force, the test sample of four producers
Middle sheath is first broken, at this moment, shown in Figure 3, the corresponding maximum of sheath fracture in the test sample of four producers
Pulling force Fmax, according to formulaCalculate the sheath fracture strength σ corresponding to the test sample of four producers.
5) boiling is carried out to the test sample of four producers respectively, and after boiling for a period of time, using the side described in 4)
Method continues to carry out plug-sheath extension test to the test sample of four producers.
6) constantly repeat 5), with the extension of boiling time, core bar jacket interface is easily come off by after water enchroachment (invasion) evil, directly
After into the test sample of each producer, core bar jacket interface comes off, core bar jacket interface comes off in the test sample of four producers
Also a maximum pull F is corresponded tomax, also according to formulaThe test sample institute for calculating four producers is right
The core bar jacket boundary strength σ answered.
7) using σ as ordinate, the boiling time is abscissa, draws the test sample of four producers respectively in different boilings
Between it is lower corresponding when m- sheath fracture strength or core bar jacket boundary strength curve (respectively such as Fig. 4, Fig. 5, Fig. 6 and Fig. 7 institute
Show).
Here, only whole test process and Drawing of Curve are described in detail by taking producer A as shown in Figure 4 as an example, factory
Family B, producer C and producer D whole test process and Drawing of Curve are similar with producer A, will not be repeated here.
Specifically, it is shown in Figure 4, plug-sheath extension test first is carried out to producer A test sample, sheath is preferentially sent out
Raw fracture, at this moment, the corresponding maximum pull F of sheath fracturemax1, according to formulaCalculate producer A's
Sheath fracture strength σ corresponding to test sample1.Then, producer A test sample is subjected to boiling, it is right after boiling for a period of time
Test sample after boiling carries out plug-sheath extension test, is still that sheath is preferentially broken, and at this moment, sheath fracture is corresponding
One maximum pull Fmax2, according to formulaCalculate the sheath fracture corresponding to producer A test sample
Intensity σ2, continue after carrying out boiling, then boiling for a period of time to producer A test sample, core carried out to the test sample after boiling
Rod-sheath extension test, at this moment, core bar jacket interface comes off, and sheath stands intact, and at this moment, interface comes off corresponding one most
Big pulling force Fmax3, according to formulaCalculate the sheath fracture strength σ corresponding to producer A test sample3,
Continue after carrying out boiling, then boiling for a period of time to producer A test sample, plug-sheath is carried out to the test sample after boiling
Extension test, it is still that core bar jacket interface comes off at this moment, and sheath stands intact, at this moment, interface, which comes off, corresponds to a maximum
Pulling force Fmax4, according to formulaCalculate the sheath fracture strength σ corresponding to producer A test sample4, such as
This is constantly repeated, it can be deduced that the σ corresponding to the different boiling times1~σnEtc. multiple centrifugal pumps, using σ as ordinate, boiling time
For abscissa, by centrifugal pump σ1~σnConnected as shown in square frame in Fig. 4 with curve, m- sheath fracture strength or boundary during acquisition
Surface intensity curve, in the starting stage of boiling, there is sheath fracture in drawing process in test sample and interface is remained intact (as schemed
Square frame shown on the left of 4 cathetus l), with the progress of boiling, drawing process median surface is started shedding off (on the right side of such as Fig. 4 cathetus l
Shown square frame).
Here, it is necessary to explanation, in the starting stage of boiling, interface come off intensity be still higher than sheath fracture it is strong
Degree, dotted line (change curve that possible interface came off with the boiling time) ordinate on the left of Fig. 4 cathetus l are more than solid line
(sheath is broken the change curve with the boiling time), in the later stage of boiling, interface starts shedding off, at this moment, because interface exists
Preferentially come off under conditions of water enchroachment (invasion) evil, therefore, sheath fracture strength is higher than boundary strength, and performance is in Fig. 4：On the right side of straight line l
Dotted line the change curve of boiling time (fracture of possible sheath with) ordinate be more than solid line (interface came off with the boiling time
Change curve), solid line and dotted line characterize the variation tendency of sheath fracture strength and boundary strength with the boiling time respectively in Fig. 4,
Both are qualitatively to illustrate variation tendency, and the intersection point of solid line and dotted line (as shown in dashed circle in Fig. 4) is broken for sheath
The equal strength of intensity and boundary strength point, as interface start shedding off corresponding point, and the abscissa corresponding to it is interface
The corresponding boiling time is started shedding off, corresponding ordinate is that interface starts shedding off corresponding boundary strength.
8) boiling time corresponding when the test sample core bar jacket interfaces of four producers starts shedding off and boundary are found out respectively
Surface intensity.As shown in Figure 4, Figure 5, Figure 6 and Figure 7, the corresponding boiling time when interface corresponding to four producers starts shedding off
Differed with boundary strength.The boiling time corresponding when core bar jacket interface starts shedding off producer A is 1-2 days, producer B
The corresponding boiling time is 10-11 days, and the boiling time corresponding to producer C is 2-3 days, the boiling time corresponding to producer D
For 6-7 days；And boundary strength corresponding when core bar jacket interface starts shedding off producer A is 1.3MPa, corresponding to producer B
Boundary strength is 1.0MPa, and the boundary strength corresponding to producer C is 1.5MPa, and the boundary strength corresponding to producer D is 1.3MPa.
Producer A and C core bar jacket interface when starting shedding off the corresponding boiling time it is shorter, but boundary strength now compares
Height, because sheath fracture strength now is still higher, drawing process median surface preferably comes off.
In summary, by the way that the composite electric insulator core bar sheath is cut into core bar jacket thin slice, and will be corresponding
Sheath is divided at least two fan-shaped sheaths being connected respectively with the plug interface, and needing, the interface to plug-sheath is strong
When degree is tested, sheath-core rod extension test is carried out by the test sample to different manufacturers before boiling and after boiling, can
The boundary strength of sheath-core rod under the conditions of boiling is tested, so as to draw the test sample of different manufacturers respectively
Sheath fracture strength or boundary strength with boiling time change curve, due in the case of no boiling, being typically described
Sheath is first broken, and as the extension of boiling time, sheath plug easily break between interface due to the infringement of water
Split, therefore, it is possible to obtain boiling time corresponding when core bar jacket interface starts shedding off and boundary strength, even if the material of sheath
Matter, the material of plug or diameter are different, and the interface of the sheath plug starts shedding off the corresponding boiling time and interface is strong
It is relevant to spend bonding force only between sheath plug, in the case of accurately reflecting the hydrolysis of the composite insulator of different manufacturers
Boundary strength height, accurate evaluation is carried out to the boundary strength of the composite insulators of different manufacturers.At the same time it can also according to survey
Test result starts shedding off the corresponding boiling time to core bar jacket interface and boundary strength sets standard, for example, can specify that
The minimum that core bar jacket interface starts shedding off the corresponding boiling time is 10 days, and core bar jacket interface starts shedding off corresponding
The minimum of boundary strength be 1.0MPa, therefore, the embodiment of the present invention can also be that the boundary strength of composite insulator is weighed
Foundation is provided.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
- A kind of 1. method for assessing different manufacturers composite electric insulator core bar sheath boundary strength, it is characterised in that including：Composite electric insulator core bar sheath after the removal full skirt of different manufacturers is cut into thickness identical plug by step 1) respectively Sheath thin slice, circumferencial direction of the corresponding sheath along plug is divided at least two and is respectively connected with the plug interface Fan-shaped sheath, as test sample；Step 2) carries out sheath-core rod extension test to the test sample of different manufacturers respectively, until the test sample of different manufacturers protects Set fracture or core bar jacket interface come off, according to the maximum pull during sheath-core rod extension test and corresponding plug The sheath fracture strength or boundary strength corresponding to the test sample of different manufacturers are calculated with the interfacial area of sheath；Step 3) carries out boiling to the test sample of different manufacturers respectively, and the test sample after boiling is protected according to step 2) Set-plug extension test；Step 4) draws when m- sheath fracture strength of the test sample of different manufacturers corresponding under the different boiling time respectively Or boundary strength curve；Step 5) compares test sample boiling time corresponding when interface starts shedding off and the boundary strength of different manufacturers, to not Composite electric insulator core bar sheath boundary strength with producer is assessed.
- 2. according to the method for claim 1, it is characterised in thatComposite electric insulator core bar sheath after the removal full skirt of different manufacturers is that core bar jacket thin slice is cut into working fluid 's.
- 3. according to the method for claim 1, it is characterised in thatSheath-core rod extension test is carried out to the test sample of different manufacturers respectively, until the test sample sheath of different manufacturers is broken Or core bar jacket interface comes off；Specifically include：The plug of the test sample is fixed, fixed the fan-shaped sheath of one of them in test sample using fixture, and to the fan Shape sheath applies pulling force so that the fan-shaped sheath moves under the drive of the fixture towards the direction away from the plug.
- 4. according to the method for claim 3, it is characterised in thatThe fixture of the fixed sectors sheath is located in the sector close to the fan-shaped sheath and the linkage interface of the plug The both sides in jacket thickness direction.
- 5. according to the method described in claim any one of 1-4, it is characterised in thatThe thickness of the core bar jacket thin slice is 4mm.
- 6. according to the method for claim 3, it is characterised in thatHung down with the tangential direction corresponding to the center of the fan-shaped sheath and the linkage interface of the plug in the direction of the pulling force Directly.
- 7. according to the method for claim 3, it is characterised in thatThe fan-shaped sheath is to be moved under the drive of the fixture with 5mm/min speed.
- 8. according to the method for claim 1, it is characterised in thatThe time for carrying out sheath-core rod extension test in the step 3) to the test sample after boiling according to step 2) is no more than 3 Hour.
- 9. according to the method for claim 1, it is characterised in thatThe sheath fracture strength or boundary strength and the maximum pull during sheath-core rod extension test and corresponding core Meet following relational expression between rod and the interfacial area of sheath：σ=Fmax/S；Wherein, σ represents sheath fracture strength or boundary strength, FmaxRepresent the maximum drawing during sheath-core rod extension test Power, S represent the interfacial area of plug and sheath.
- 10. according to the method for claim 9, it is characterised in thatThe interfacial area S of the plug and sheath is equal to the linkage interface of corresponding fan-shaped sheath and plug along the plug The length of circumferencial direction and the product of the thickness of the core bar jacket thin slice.
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| CN110501285A (en) * | 2019-09-06 | 2019-11-26 | 江苏祥源电气设备有限公司 | Composite electric insulator core bar and silicone rubber jacket glue and degree detection device |
| CN110806409A (en) * | 2019-11-27 | 2020-02-18 | 云南电网有限责任公司电力科学研究院 | Method for detecting bonding strength of composite insulator |
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| CN110501285B (en) * | 2019-09-06 | 2021-08-31 | 江苏祥源电气设备有限公司 | Composite insulator core rod and silicon rubber sheath viscosity degree detection device |
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| CN112986757A (en) * | 2021-02-03 | 2021-06-18 | 浙江紫电新材料有限公司 | Alicyclic epoxy resin insulator core rod-sheath interface performance detection method based on defect extension rate |
| CN116879028A (en) * | 2023-09-07 | 2023-10-13 | 淄博阔泰绝缘子有限公司 | Multi-angle intensity detection device for insulator |
| CN116879028B (en) * | 2023-09-07 | 2023-11-07 | 淄博阔泰绝缘子有限公司 | Multi-angle intensity detection device for insulator |
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